August herzog



(No Model.)

. A. HERZOG.

Draftsman's Triangle.

No. 233,618. Patented Oct. 26,1880.

linin gs.

UNITED STATES PATENT @FFICE.

AUGUST nnnzoe, OF NEW YoRK, N. Y.

DRAFTSMANS TRIANGLE.

SPECIFICATION forming part of Letters Patent No. 233,618, dated October 26, 1880.

Application filed July 30, 1880.

To all whom it may concern:

Be it known that I, AUGUST HERZOG, of the city, county, and State of New York, have invented certain new and useful Improvements in Triangles, of which the following is a specification.

The triangles heretofore in use by draftsmen have been Constructed either solid out of one piece, or of three pieces which are framed at their meeting edges, and, for better appearance and greater strength, lined at the outside, or at the outside and inside edges. The solid triangles are liable to warp, and are therefore used mainly for school and other purposes, in which no great degreeof accuracy is required. The framed triangles, jointed at the meeting edges, require considerable hand-work, owing to the connecting groove-and-tongue joints of the parts, they being furthermore liable to shrink and break when dropped. The openframed triangle, which is lined at the exterior and interior edges, requires still more handwork, and is too expensive for mostpurposes.

The object of my invention is to furnish for oftice and draftsinens use an im proved triangle which is not liable to warp, which can be made cheaper than any other ofthose described, with the exception of the solid kind, and which has a better appearance than the open-framed and lined triangle.

Myinvention consists ot'a triangle composed of an open triangular portion made of one piece and of an exterior lining. The triangle is manufactured by first lining a solid triangular block on its three sides, then cutting out the triangular center portion, and finally sawing off one triangle after the other from the block thus obtained, and finishing each triangle separately.

1n the accompanying drawings, Figure 1 represents the common solid triangle 5 Fig. 2, a framed open-center triangle; Fig. 3, a framed open-center triangle with exterior and interior Fig. 4 is a top view of my improved solid open-center triangle with exterior edgelining; and Fig. 5 is a perspective View of the solid block from which my triangles are made.

(No model.)

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the interior portion of my improved triangle, and B the exterior lining of the same. The inner portion is made solid out of one piece and with open center, the lining B being fitted around the outer'edges of the same.

The solid triangle shown in Fig. 1 is made from wood of a certain thickness, while the triangles represented in Figs-2 and 3 are made of three separate pieces, each of which is cut with or without the lining from a separate block. The joining of the three pieces at the meeting edges either by groove and-tongue joint or otherwise is expensive and difficult to accomplish, requiring the most accurate workmanship.

ln contradistinction to the methods just described, the improved triangle shown in Fig. 4 is made by applying to the three sides of a solid triangular block of wood exterior layers of lining, then cutting out the triangular center portion, next sawing 0E one triangle, after the other from the open-center and lined block, and finally finishing each triangle in the usual manner, by sandpapering, &c. In this manner a new style of triangle is obtained, which is prevented from warping by the exterior lining, which is not liable to breakjoint at the meeting edges, and which is neater in appearance and considerablycheaper than the framed and lined triangles at present in general use.

Having thus described my invention, I claim as new and desire to secure by Letters Patent As a new article of manufacture, a triangle consisting of an 0pen-center solid portion and of a framed exterior lining, substantially as set forth.

In testimony that I claim the foregoing as iny invention I have signed my name, in presence of two witnesses, this 22d day of July, 1850.

Witnesses: AUGUST HERZOG.

PAUL GOEPEL, CARL KARP. 

